A novel player in inflammation is interleukin-17 (IL-17), and several studies have already confirmed its role in the pathogenesis of various autoimmune and inflammatory disorders such as systemic psoriasis, rheumatoid arthritis, inflammatory bowel disease, systemic lupus erythematosus, multiple sclerosis [16], type 1 diabetes (T1D) [17], and even T2D [18]. This evidence concerns the gene IL17A and multiple sclerosis.